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928 results on '"Wei, Tai‐Bao"'

133. Fluorescence and colorimetric‐based sensing of Hg2+ and Cu2+ using rhodamine derivative.

Author

Hu, Jian‐Peng, Lin, Qi, Yao, Hong, Zhang, You‐Ming, and Wei, Tai‐Bao

Subjects
COLORIMETRY, DETECTION limit, ULTRAVIOLET spectroscopy, RHODAMINES, DENSITY functional theory, FLUORESCENCE, METAL ions
Abstract

Effective and simultaneous detection of multimetal ions has been achieved by a colorimetric and fluorometric sensor (RA), which was fabricated between rhodamine hydrazide and 9‐anthraldehyde through a simple Schiff base reaction. Sensor RA provided an effective platform for reliable detection of Hg2+ with a detection limit as low as 9.978 × 10−9 and displayed fabulous sensitivity for Cu2+ with a low limit of detection (LOD) of 4.81 × 10−8 M of detection limit toward Cu2+. Among them, the detection limit for heavy metal mercury ions has reached the ultrasensitive level. The sensing mechanism between RA and metal ions was further confirmed by 1H NMR and IR titration experiments and high‐resolution mass spectrometry and discussed from a theoretic level based on crystal structures and density functional theory (DFT) calculations. The switch in turn‐on signaling was attributed to the spiro‐lactam and ring‐opened form of RA and was accompanied by significant changes in ultraviolet spectroscopy and fluorescent spectrum. [ABSTRACT FROM AUTHOR]

Published
2023
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138. A Pd2L4 Metallacage‐Cored Supramolecular Amphiphile and Its Application in Dual‐Responsive Controllable Release†.

Author

Chai, Yongping, Qin, Peng, Li, Xupeng, Wei, Tai‐Bao, Lin, Qi, Zhang, You‐Ming, Yao, Hong, Qu, Wen‐Juan, and Shi, Bingbing

Abstract

Comprehensive Summary: The construction of multi‐responsive supramolecular systems for drug delivery is a challenging task. In this work, a Pd2L4 metallacage 1·([BF4]−)4 with four pyrene units was first designed and synthesized through coordination‐driven self‐assembly. After the introduction of γ‐CD, a supramolecular amphiphile 1–γ‐CD was successfully constructed based on the host–guest molecular recognition between γ‐CD and the pyrene unit of 1·([BF4]−)4, which further self‐assembled into dual‐responsive supramolecular vesicles in aqueous solution. DOX·HCl was used as a model molecule to study the drug encapsulation and release behavior of the supramolecular vesicles. By adjusting the pH of the solution to acidic condition or adding a certain amount of α‐amylase, the vesicle structure was destroyed to achieve rapid and effective release of the drug molecules. This study provides an example for the rational design of efficient dual‐responsive supramolecular nanocarriers, which have potential application value in the field of controlled drug delivery. [ABSTRACT FROM AUTHOR]

Published
2022
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